Today we can reveal one of the Guest Stars for the next episode of The Mary Morstan Mysteries.Following the likes of Joe Sandz and Emma Lillie Lees, Rosanna Smith will be making the cross from No Place Like Holmes to The Mary Morstan Mysteries in order to play an ancestor.

Rosanna originally appeared as the no nonsense librarian Miss Katrina Bliss in the episode "Dawn Of The Red".

Her appearance in the NPLH spin off will be as trainee convent nun Sister Abigail Bliss.

The episode, the 4th of the 2nd series, is expected to be released in November.

Peter is most famous for his stint as King Henry VIII at Hampton Court Palace, he has also recently found himself cast as oddly seedy doctors in film, plays, tv shows, an opera and a straight to dvd horror.

Come back tomorrow to find out more about another of the Episodes Guest Stars.

Those who recall the Series 3 finale Episode "Dialysis Murder" might recognize the subject of this upcoming Guest Star announcement.Joe Sandz, who appeared in NPLH as Daniel "Moonshine" Digweed will be appearing for 2 episodes of NPLH spin off "The Mary Morstan Mysteries" as farmhand Thomas Digweed - ancestor of the once imprisoned hippy.

The second episode of the second MMM series is expected to be released in mid June.